Lamp construction



Patented July 29, 1930 7 unites STATES PATENT OFFICE manual-ma ni-EDWARD C. ALBRIGI I'I, -OF CONNER-SVILL E, INDIANA, ASSIGNOR TO INDIANALAMP CORPORATION, OF CONNE-RSVILLE, INDIANA, A CORPORATION LAMPCONSTRUCTION Application filed February 23, 1928. Serial No. 256,139.

This invention relates to a lamp structure, and particularly to a signallamp embodying a stop signal with a tail light.

The principal object of the invention is to provide a simple andeconomical construction of contact members connecting the plug of thecircuit with the respective lamp bulbs.

The full nature of the'invention will be more clearly understood fromthe accompanying drawings and the following description and claim.

Fig. 1 is a side elevation of a signal lamp with a. portion thereofshown in central vertical crosssection. Fig. 2 is a section taken on theline 22 of Fig. 1 V

In the drawings there is shown a signal lamp having a casing 10 with alens'door 11 provided with a stop signal lens 12 and a tail.

light lens 13. Mounted within the casing there is a transverse partition14 dividing the lamp into the signal compartment 15 and tail lightcompartment 16Z In each of said compartments there is provided the lampbulbs 17 and 18, respectively. The rear of thecasing has secured thereonthe lamp sockets 19 and 20 extending into the respective compartments 15and 16 to receive the lamp bulbs 17 and 18 in the usual manner. Suitableprojections 21 extendrearwardly from thec-asing for enabling the lamp tobe mounted in position on a vehicle. 7 i

The center of the rear Wall of the casing is provided with a flangedsocket 22 adapted to receive a bayonet slotted shell 23 in whichtheusual connecting plug 24 may be removably inserted carrying thecircuit wires 25 and 26.

Mounted interior-1y of the casing and held in position by the. shell 23in the socket22, there is a plug 27 of non-conducting mater al in whichthe circuit pins 28 and 29 are slid ably mounted in position to beengaged by the contacts of the plug 24 leading from the circuit wires 25and 26, respectively. The inrigid fiber strip 82, as indicated at 33.Said fiber strip rests upon the inner face of the plug 2'? and'has itsopposite ends extending into the sockets 19 and 20. The outwardlyextending ends of the contact strips extend into the sockets 20 inposition to be engaged by and make contact with the lamp bulbs 17 and18. The spring contactstrips 30 and 31 have their ends spaced from thefiber strip 32 so that when pressed toward oraway from said fiber stripthey will exert a spring tension;

By means of this construction, the inner adjacent ends of the springcontact strips will eXertaQspring resistance to the pressure exerted onthe pins 28 and 29'by the engagement therewith of the connecting plug24. On the other hand, the outer ends of the spring contact strips willexert an outward pressure against the lamp bulbs to hold them in bayonetlocked position in their socket and maintain electrical contacttherewith.

The invention claimed is:

In a lamp casing, a pair of lamp bulbs spaced apart from each other,sockets mount- 7 ed in said casing for receiving said bulbs, an

insulating plug mounted in said casing intermediate the sockets thereof,a pair of contact pins slidably mounted in said plug, an insulationstrip extending from one socket to the other, and a pair of oppositelydisposed spring contact strips secured intermediate of their ends tosaid insulation strip and having their inner ends yieldingly engagingthe re spective inner ends of said pins and their outer ends'extendinginto said lampsockets and yieldingly engagingthe contact points of saidbulbs. e

In witness whereof, I have hereunto affixed my signature.

EDWARD C. ALBRIGHT.

ner ends of the circuit pins extend on opposite sides of the partition14, and have slidably secured thereto the spring contact strips

